Compute Local Apparent Sidereal Time ... Sidereal time is the hour angle of the vernal equinox, the ascending node of the ecliptic on the celestial equator. ... Astronomers use local sidereal time because it corresponds to the coordinate right ascension of a celestial body that is presently on the local meridian.
tycho.usno.navy.mil/sidereal.html tycho.usno.navy.mil/sidereal.html
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Sidereal time - Wikipedia, the free encyclopedia
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Astronomers use sidereal time as a way to keep track of the direction in which their telescopes need to be pointed to view any given star in the night sky. Just as the Sun and Moon appear to rise in...
en.wikipedia.org/wiki/Sidereal_time
sidereal time n. Time based on the rotation of the earth with reference to the background of stars. ... Dictionary: sidereal time ... The reference point for marking sidereal time is the vernal equinox, one of the two points where the planes of the Earth's Equator and orbit appear to intersect on the celestial sphere.
www.answers.com/topic/sidereal-time www.answers.com/topic/sidereal-time
Sidereal Time literally means “star time”. The time we are used to using in our everyday lives is Solar Time. The fundamental unit of Solar Time is a Day: the time it takes the Sun to travel 360 degrees around the sky, due to the rotation of the Earth.
docs.kde.org/en/3.1/kdeedu/kstars/ai-sidereal.html docs.kde.org/en/3.1/kdeedu/kstars/ai-sidereal.html
The sidereal time is measured by the rotation of the Earth, with respect to the stars (rather than relative to the Sun). Local sidereal time is the right ascension (RA, an equatorial coordinate) of a star on the observers meridian.
www.jgiesen.de/astro/astroJS/siderealClock/ www.jgiesen.de/astro/astroJS/siderealClock/
A solar day is exactly 24 hours (of solar time). Because of the Earth's revolution, a solar day is slightly longer than a sidereal day. In every day life, we use solar time. ... Sidereal time is time kept with respect to the distant stars.
www.astro.cornell.edu/academics/courses/astro2201/sider... www.astro.cornell.edu/academics/courses/astro2201/sidereal.htm
Sidereal - Wikipedia, the free encyclopedia
The adjective sidereal can refer to various things, including: • Measurements of time: • Sidereal time • Sidereal day • Sidereal month • Sidereal year • Sidereal period of an object orbiting a star ...
en.wikipedia.org/wiki/Sidereal
Sidereal Time and Solar Time ... Technically, the sidereal time is defined as the length of time since the vernal equinox has crossed the local celestial meridian. An equivalent definition of the sidereal time is the right ascension of any star presently located on the local celestial meridian.
csep10.phys.utk.edu/astr161/lect/time/timekeeping.html csep10.phys.utk.edu/astr161/lect/time/timekeeping.html
Since it is 1 hour later than 0:00, the sidereal time must be (button: 01:00). Notice that the RA that is now crossing the meridian is 1h, so sidereal time = RA of an object that is on the meridian.
www.polaris.iastate.edu/NorthStar/Unit4/unit4_sub2.htm
Definition of sidereal time from Webster's New World College Dictionary. Meaning of sidereal time. Pronunciation of sidereal time. Definition of the word sidereal time. Origin of the word sidereal time. ... Dictionary Home » Webster's New World College Dictionary » sidereal time...
www.yourdictionary.com/sidereal-time www.yourdictionary.com/sidereal-time
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